The 8 Best Full Synthetic Gear Oils (2022 reviews)

The look and feel of these oils are consistent with the high quality we're used to from the rest of Mobil 1's lineup. The latest Mobil 1 Full Synthetic Gear Oil is an absolute beast in terms of its features, and rightfully takes the top spot with ease. In short, with a 4.9 rating and more than 7656 buyers, the mobil 1 full synthetic gear oil stands as the best choice.

Most customers find that the oil comes out thick and clean, almost like it is new. In addition, they say that the oil is superior to gear lube (gl) ratings under high performance. In addition, they also found that this is oil, which is a lubricant, at the weight / viscosity indicated. In conclusion, many customers have used the oil for more than a few months without any issues, and it shows no sign of giving up.

Top Customer Quotes:

It looks like a van is used for that purpose.
This can be used by listing the specifications and viscosity the lubricants must satisfy.
This is great for toyota vehicles.
This is perfect for rv front hubs.

Designed For Transmissions: Lucas Oil Full Synthetic Gear Oil

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The Lucas Oil line of oil comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Lucas oil, full synthetic gear oil, is great for a great price and it is made for good value. Make sure this fits by entering your model number. Further, the oil is designed especially for heavy duty or high performance applications where regular gear lubricants just aren't good enough.

The oil makes for much quieter, makes for a great buy and it is made for good stuff. Further, the oil works well for good quality and it comes with great stuff. Most importantly, lucas oil, full synthetic gear oil, is conventional and it is suitable for cooler temps.

Almost all buyers agree that the oil can be used in 99 wj grand cherokee. Also, a few also found that the oil is good to use on lsd diff.’s. Also, they strongly agree that the oil protects better than full synthetic oil, you spend a little bit more but lasts longer between changes. To sum up, the tone of buyers is very positive and we believe that oil suits the purpose.

Customers also found that its wise to buy a full synthetic gear oil, along with this oil.

Top Customer Quotes:

This is great for oil bath wheel bearings as well.
This is a better route than paying a dealer.
This is used for the 2011 f350 rear differential paires with the Dorman 697.
This is a good price also after doing a good deal of comparison shopping.

Best For Rear Axle: Royal Purple Full Synthetic Gear Oil

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The Royal Purple Full Synthetic Gear Oil's superior materials makes sure that it ages well with use. The royal purple full syntheticgear oil is black and it makes it much quieter. Make sure this fits by entering your model number. Moreover, the oil is very smooth and it never looks back.

The oil works great and it is much cheaper. Most importantly, the royal purple full synthetic gear oil is made for good stuff and it is more responsive.

Almost all buyers quickly discovered that the oil will work, if you have a manual transmission. Also, they strongly agree that the oil is totally synthetic and the label on the bottle lists almost all types of differentials it will work in. Further, they also found that the oil is fully synthetic and royal purple makes excellent products. Overall, most customers call the oil suits best, and no one questions it.

Few customers got synthetic 75 90 gear oil and muncie 4 speed gear oil, along with the oil.

Top Customer Quotes:

This is formulated to maximize performance and provide synthetic defense.
This is good for the synchros as it does hurt brass.
This is too slippery for the syncros to function correctly.
This allows for horse power to increase as well as better mpg.

Best For Any Car: Mobil Full Synthetic Gear Oil

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The mobile fullsynthetic gear oil might be a relatively new release, but it's still nothing short of impressive this year, thanks to multiple price cuts and added new features over the past few months. Moreover, this is great for a great price, is next and it is built for good performance. The Mobil Full Synthetic Gear Oil's material feels more premium than its price would suggest. Lastly, the mobil full synthetic gear oil is black and it works well.

Almost all buyers found that the oil can be used on 2005 lexus gs300, thanks. Also, a few strongly agree that the oil is compatible with or without the option code g80 locking differential. Moreover, they say that the best gear oil for differentials w/o lsd. This stuff is really hard to find.

Customers say that buying a 50 weight synthetic transmission fluid, with this oil made their life much easier.

Top Customer Quotes:

This gearoil is probably better than the LS version.
This is good for volvo penta transmissions.
This is enough for one drain and fill.
This is made for open diffs.

Best For Model Number: Triax Full Synthetic Gear Oil

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The Triax Full Synthetic Gear Oil is capable of outshining several other oils featured in this list in overall features for the price point. The triax full syntheticgear oil makes for smoother shifting and it has significantly lowered oil requirements. The manufacturer says: We provide arctic grade low pour points, high viscosity index, extreme oxidation resistance, over the top anti-wear properties, and an extremely long fluid life. This with improved stability, fluid durability, wear prevention, and significantly improved parts longevity.

Most importantly, the triax fullsynthetic gear oil allows dry lubrication, extreme cold rapid starts, significantly reduced wear, improved fuel economy, and an outrageously long fluid life.

Almost all customers opine that the oil comes in a box from api or whoever. In addition, they say that the oil will work on both front and rear diffs. Further, a few strongly agree that the oil can be used in selected manual transmission and. In short, at the price, they believe that they got a steal of a deal with it.

Top Customer Quotes:

It will be available on Amazon in September.
This is a top - tier, all-encompassing lubricant line designed primarily for agricultural and construction equipment.
This is a very good lubricant though, find the right weight.
This features exceptional power transfer under extreme conditions.

Best For Country Of Origin: Amalie Full Synthetic Gear Oil

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The Amalie Full Synthetic Gear Oil is capable of outshining several other oils featured in this list in overall features for the price point. And, this is good for the country of origin and it is good for best value. Make sure this fits by entering your model number. Finally, the amalie full synthetic gearoil has been carefully developed to meet the most current api service classification.

Most buyers found that the oil is great for a g80 locker. Also, they also found that this synthetic lube oil seemed to be perfect at a fraction of the cost of the name - brand ones.

Customers also discovered that its wise to buy a full synthetic gear oil, along with this oil.

Why We Like This:

Country of origin : United States.
Package dimensions: 5.08 h x 25.907 l x 13.208 w (centimeters).
Delivers what they promise.

Best For Limited Slip: Amsoil Full Synthetic Gear Oil

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Amsoil has been making great oil for years, thanks to a combination of clever design and appropriate materials. Next on the list, we've got yet another oil that manages to win our hearts. It's the Amsoil Full Synthetic Gear Oil and it's widely considered as one of the most convenient oils you can buy. In conclusion, with a 4.8 rating and more than 368 buyers, the amsoil full synthetic gear oil stands as the best choice.

In conclusion, for most customers, it was just what they wanted.

Why We Like This:

Good brand reputation.
New and hot releases.

Best For Transmissions: Maxima Full Synthetic Gear Oil

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Maxima has been making great oil for years, thanks to a combination of clever design and appropriate materials. Formulated for use on motorcycles and atvs. In addition, the oil is designed for transmissions without wet-clutches, differentials with or without hypoid gears and shaft-drives. The oil is easy to maintain and it will match with your daily use.

Customers say that getting a _cycle_gear_ oil filter, along with oil is useful.

Why We Like This:

Excellent in bmw and harley-davidson applications.
Exceeds the requirements of api gl-5.
Full synthetic, ester-based gear oil specifically formulated for use in motorcycles and cars.